Turbine-bucket.



0, SMOOT. TURBINE BUCKET. APPLICATION TILED 10150.23. 1907.

Patented June 29, 1909.

as bent into its final shape.

UNITED S T CHARLES HEAD 8;00'1, (ll LA GIL-\Ntlll, ILLINOIS.

TURBINE-BUCKET.

Specification of Letters Patent.

Patented June 29, 1909.

Application filed December 23, 1907. Serial No. 407,858.

To all whom it may concern:

Be it known that I, CnARLEs H can SMOOT, citizen of the United States, residing at La Grange, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in T U1'l)lJlL-Bll('l0i$, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to an improved form of turbine buckets, though I do not wish to be limited in the application of this invention to turbines.

My invention has as its object the blading of steam turbines and other fluid operating machines.

By means of my invention I provide a bucket which can be made, if desired, from sheet metal, can be securely attached to the periphery of a wheel, and presents a smooth passage to the flow of steam through said buckets. This construction permits the use ol a wheel having a light periphery for a given thickness cl bucket material, and is characterized by the use of two principal parts, one of which. forms thecurved portion oi the bucket proper, the other part forming a spacing plate or shield, which at the same time, serves to still'en and reinforce the bucket proper in its right position and furthermore, forms a smooth channel for the passage of the impelling fluid.

I, will explain my invention more fully by reference to the accompanying drawings.

Figure 1 shows the separating plate or shield developed on a plain surl'ace. Riveting holes and notches 1, 2, 3, l. 5, and 6 are shown at either end oi separating plate, by means of which it is attached to the wheel. In shaping this plate to its vfinal form, the plate is bent downward through the dotted lines, (r -o, and bb and outward through thedotted lines, c-r and d-d.

Fig. 2 shows the separating plate or shield The lines 0, b, c and d correspond to lines of similar letters in Fig. 1.

Fig. 3 shows the bucket blade developed on a plain surface. The finished bucket blade is obtained from this by curving upward the 3 portion between the dotted lines, 6 and c and the left hand extremity, gg, this curvature being in any form desired, usually to a portion of a cylindrical surface. The late is also bent upward along the dotted ines,-c and c and then outward along the dotted lines, f and f. The process of bending prospective Fig. 4. The lower portion of the blade below the dotted lines, fandf are two flat parallel surfaces, known as the bucket tangs, by means of which the bucket is attached to the periphery of the wheel, by means of rivets passing through the holes 1, 2 and 4. The dotted lines 6, f and f shown in Fig. 4 correspond in their location on the strip of material to the dotted lines of similar letters in Fig. 3.

In Fig. 5 is shown a portion of a wheel to which has been attached some of the above described buckets and separating plates. A indicates a portion of the wheel. 7 indicates the blade described in detail in Figs. 3 and i. a indicates the spacing plate shown in detail in Figs. 1 and 2. Nos. 4, 5 and 6 indicate the location of rivets which pass through the taugs and periphery of the whee uniting all three parts tirml y together.

I do not want to be restricted torivetiug as the means of attaching the spacing plates and buckets to the wheel, as substitutes for riveting are obvious to those skilled in the art.

Having thus described my invention I, claim as new and desire to secure by Letters latent:

1. In a wheel carrying buckets a hollow rim extendingabove the periphery oi the wheel proper through which buckets emerge.

'2. In a wheel carrying lnickcts a hollow rim held astridc on the, wheel periphery through which buckets emerge.

3. In a wheel carrying bucket-s a hollow rim made. in sections and buckets emerging between each section of the hollow rim.

4. In a wheel carrying buckets held astride on its periphery a hollow rim through which buckets emerge.

In witness whereof, hereunto subscribe my name this 16th day of December A. 1)., 1907.

CHARLES HEAD SMOOT.

Witnesses:

S. Barre, I MURRY NnLsoN,Jr.

lower, extremity of the spacing lates, blade duces the complete blade as shown in per- 

